Permissions, Privileges, and Access Controls in Windows and Windows Server - CVE-2021-43893
Published: December 14, 2021 / Updated: February 14, 2022
Vulnerability identifier: #VU58952
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2021-43893
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a remote authenticated attacker to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions in Windows Encrypting File System (EFS), which leads to security restrictions bypass and privilege escalation.
How to mitigate CVE-2021-43893
Install updates from vendor's website.